Data Storage Converter
Convert between bits, bytes, KB, MB, GB, TB and their binary counterparts KiB, MiB, GiB, TiB.
About this tool
The reason a 1 terabyte drive shows up as 931 gigabytes is that two different definitions share the same casual names. Storage manufacturers use decimal units where a gigabyte is one billion bytes, while operating systems have traditionally reported binary units where a gibibyte is 2 to the 30th bytes, about 7.4 percent larger.
This converter keeps the two systems explicit: KB, MB, GB, and TB are powers of 1000, and KiB, MiB, GiB, and TiB are powers of 1024. Converting between the columns answers the missing space question exactly, and bits are included for network speeds, which are always quoted in bits per second.
Frequently asked questions
Why does my 1 TB drive show 931 GB?
The drive contains one trillion bytes. Your operating system divides by 1024 three times, reporting the same quantity as roughly 931 GiB, historically labeled GB.
Why are internet speeds in bits?
Networking has always measured raw signal in bits per second. Divide by 8 for bytes: a 100 Mbps connection moves at most 12.5 MB per second.